The story follows Brady Hartsfield, a mentally deranged ice cream truck driver and IT worker who is secretly the demented serial murderer named ‘The Mercedes Killer’ (Treadway).

The killer taunts a retired police detective (Brendan Gleeson) with a series of lurid letters and emails, forcing the ex-cop to undertake a private, and potentially felonious, crusade to bring him to justice.

The project received a straight-to-series order a month before Yelchin’s death.